Tuner, broadcast signal processing apparatus comprising the same, and broadcast signal processing method
a broadcast signal and processing apparatus technology, applied in the direction of discontnuous tuning with seperate pre-tuned circuits, television systems, transmission monitoring, etc., can solve the problems of deteriorating the signal, lowering the picture quality of the terrestrial tv broadcast signal, and damaging the pictur
Inactive Publication Date: 2007-01-11
SAMSUNG ELECTRONICS CO LTD
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Benefits of technology
[0009] An aspect of embodiments of the present invention is to address at least the above problems and / or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of embodiments of the present invention is to provide a tuner, a broadcast signal processing apparatus and method, which satisfy reception sensitivity of both terrestrial and cable TVs, when selecting a broadcast signal through a single conversion tuner.
Problems solved by technology
If the single conversion tuner is used in the cable TV environment, harmonic components, which are generated when the signal is amplified, are poorly eliminated due to nonlinear property of the MOSFETs F1, F2 and F3, thereby deteriorating the signal and damaging a picture.
However, the conventional double conversion type tuner (not shown) is low in the noise figure, thereby lowering picture quality when the terrestrial TV broadcast signal is received.
Also, the double conversion type tuner is more expensive than the signal conversion tuner.
Method used
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[0025] The matters defined in the description such as a detailed construction and elements are provided to assist in a comprehensive understanding of the embodiments of the invention. Accordingly, those of ordinary skill in the art will recognize that various changes and modification of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
[0026]FIG. 2 is a control block diagram of a tuner according to an exemplary embodiment of the present invention. The tuner according to an exemplary embodiment of the present invention comprises an input filter 15 to filer an input broadcast signal in a plurality of frequency bands, based on a predetermined frequency band. The tuner also comprises an amplifier 20 to amplify a second signal having an original phase induced by the output signal of the respective frequency bands and a first signal...
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A tuner, a broadcast signal processing apparatus and method, which satisfy reception sensitivity of both terrestrial and cable televisions, when selecting a broadcast signal through a single conversion tuner, are provided. A tuner selects a broadcast signal of a selected channel. The tuner includes an input filter that filters a received broadcast signal into plural frequency bands based on a predetermined frequency band. An amplifier amplifies a second signal having an original phase induced by an output signal of the respective frequency bands, and a first signal having an opposite phase of the second signal, and outputs the signal induced by the amplified first and second signals as an amplification signal of the signal in the respective frequency bands. An inter-stage filter filters a frequency of the broadcast signal corresponding to the selected channel among the amplification signals output from the amplifier. A converter converts the broadcast signal of the frequency filtered by the inter-stage filter.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit under 35 U.S.C. ยง119(a) of Korean Patent Application No. 2005-0060397, filed on Jul. 5, 2005, in the Korean Intellectual Property Office, the entire disclosure of which is hereby incorporated by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a tuner, a broadcast signal processing apparatus and method. More particularly, the present invention relates to a tuner, a broadcast signal processing apparatus and method, which satisfy reception sensitivity of both terrestrial and cable televisions (TVs) when selecting a broadcast signal through a single conversion tuner. [0004] 2. Description of the Related Art [0005] As shown in FIG. 1, a conventional single conversion type tuner having a three band configuration comprises an input tuning filter 4 having a very high frequency low (VHFL) filter 1 to pass a VHF-low frequency band of a received bro...
Claims
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Login to View More IPC IPC(8): H04B1/26H04N5/62H04B1/18H04B17/40
CPCH03J5/244H04N5/50
InventorCHOI, YONG-HO
OwnerSAMSUNG ELECTRONICS CO LTD